Full-stack developer: web platforms, real-time video & collaboration, AI features, payments and subscriptions. I take a product from idea to a live, tested, monitored service.
Each one is a working product — with accounts, payments where needed, and its own deployment.
Four Spring Boot 3 / Java 21 services — users, content, meetings and an API gateway — on a shared security library.
A simple video-call + whiteboard tool for 1:1 and small-group meetings, sold on a free / Pro plan. Lobby, rooms, chat and three interface languages.
A sleep, meditation and focus app: long narrated stories, soundscapes and "living" animated landscapes. Free trial, then a subscription.
A photo editor with free tools that run fully in the browser and paid AI edits on three subscription plans priced against real model costs.
A Mac app that turns a PowerPoint deck plus webcam and microphone into a finished video — no video editor needed.
A full test-prep course inside the platform: practice sets and four full-length timed simulations with neural-voice audio.
One platform instead of Zoom + Quizlet + Google Docs + spreadsheets. Video lessons with a shared whiteboard, homework, adaptive practice, vocabulary, exam prep, schedules and payments — used daily by a real school.
Organisations, four roles and strict data isolation — every query is scoped and covered by tests.
2,300+ exercises parsed from a 308-page book. Wrong answers are classified by topic and drive follow-up drills — no per-use AI cost.
Packages counted automatically from real sessions, Stripe and manual payments, reminders via the organisation's own Telegram bot.
A neural denoiser plus a custom AudioWorklet gate keeps only the voice — barking dogs, drills and keyboards are cut before audio leaves the device. Flip the switch.
Neural denoiser (GTCRN, RNNoise fallback) plus a custom AudioWorklet noise gate and level boost, tuned on data from 105 call participants.
Moved from P2P to a self-hosted LiveKit SFU; TURN over TLS on port 443 for strict firewalls; adaptive video bitrate by measured upload.
In-call telemetry (RTT, loss, levels). Traced one user's audio loss to a congested ISP interconnect using mtr and RIPE Atlas — and designed a regional relay around it.
MediaPipe segmentation with a CPU path and canvas compositing to work around Safari limitations, auto-disabled on slow devices.
CSRF origin checks, session revocation, signed-in-only uploads, security headers, dependency audit to zero — each fix with a regression test.
CI (API tests on real Postgres, Playwright e2e, lint), staging copy, nightly off-site backups with verified restore drills, error alerts.
I'm Galina, a full-stack developer based in Spain, working remotely. I design, build and run complete products: frontend, backend, databases, real-time media, payments and the servers they live on.
I started in backend Java at a bank, then co-founded a company and built its whole platform — from microservices to a mobile app. I care about clean architecture, tests and what happens in production at 3 a.m., and I explain technical trade-offs in plain words.
Moscow University of Finance and Industry
Spring & microservice patterns · SQL & PostgreSQL · Algorithms (LeetCode) · Full-stack JavaScript
I start from your users and your business: who uses it, what they pay for, what must never break.
You see a working version early and often. Decisions are yours; I explain trade-offs in plain words.
Automated tests, CI, a staging copy and a security pass before anything reaches real users.
Deploy, backups, alerts — then I fix what real-world data shows, not what we guess.
Tell me what you're building. I'll reply with questions, a rough plan and an estimate.
svirina1384@gmail.com